局部策略迭代的程序分析
Program Analysis with Local Policy Iteration
摘要:
我们提出了一种新的算法,用于推导数值不变量,结合了最大策略迭代的精度与传统Kleene迭代的灵活性和可扩展性。它在可配置程序分析(CPA)框架中定义,因此允许分析间通信。它使用可调块编码来遍历无循环的程序部分,可能包含分支,而不引入额外的抽象。我们的技术操作在任何模板线性约束域,包括区间和八角形域;模板也可以从程序源代码中导出。的实施进行了评估,从软件验证比赛(SV-Comp)的一组基准。它可以与最先进的分析仪竞争。
英文摘要:
We present a new algorithm for deriving numerical invariants that combines the precision of max-policy iteration with the flexibility and scalability of conventional Kleene iterations. It is defined in the Configurable Program Analysis (CPA) framework, thus allowing inter-analysis communication. It uses adjustable-block encoding in order to traverse loop-free program sections, possibly containing branching, without introducing extra abstraction. Our technique operates over any template linear constraint domain, including the interval and octagon domains; templates can also be derived from the program source. The implementation is evaluated on a set of benchmarks from the Software Verification Competition (SV-Comp). It competes favorably with state-of-the-art analyzers.
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